TREATED WOODViance –Wood Treatment Solutions 1 TREATED WOOD Presented by: RESIDENTIAL DECK CONSTRUCTION ICC PP Course # 8943 Credit Hours: 0.1 Hour CEU Proud member of the ICC and

Viance – Wood Treatment Solutions1

TREATED WOOD

Presented by:

RESIDENTIAL DECK CONSTRUCTIONICC PP Course # 8943 Credit Hours: 0.1 Hour CEU

Proud member of the ICC and a Preferred Education Provider: PPP ID # 1531

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TREATED WOOD

WOOD PROTECTION TREATMENT STANDARDS USE APPLICATIONS DECK BUILDING CODE

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WOOD PROTECTION

• The Greeks and Romans soaked bridges in olive oil and protected ship hulls with tar.

• Railroad crossties have been treated with creosote since the 1800’s.

• Over the past 100 years treated wood has been used for industrial, agricultural, and utility applications.

• In more recent times, treated wood use has expanded into residential decks and backyard projects.

Innovation in treated timber products continues to this day.

Treating wood has been practiced for almost as long as the use of wood itself

• Sustainable Long Service Life – Pressure treatment extends the life of wood products in service, helping balance overall demand on forest resources.

• Resources – Wood products are produced from trees, a naturally renewable resource. More wood is grown each year in the U.S. than is harvested.

• Quality Construction – As a building material, wood offers a unique combination of benefits, including strength, affordability, ease-of-use and environmental superiority.

WOOD PROTECTION

Extending the Service Life of Wood Products

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Preserving & Protecting Wood from Environmental Hazards

Learn more about the benefits of wood at: http://southernpinedecks.com/the-green-choice/

http://southernpinedecks.com/the-green-choice/

▪ By the type of carrier or solvent:Creosote vs. oilborne vs. waterborne solutions

▪ By the preservative’s chemistry:Organic vs. inorganic metallic compounds

▪ By the application process:Pressure vs. non-pressure

How are Preservatives Classified?

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WOOD PROTECTION: PRESERVATIVES

The level of chemical preservatives retained in the wood after treatments is referred to as “Retention”.

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Treated wood used in Residential Deck Projects is end tagged with the proper Use category name and abbreviation code, pcf., and chemical.

• Retention levels are expressed in pounds of preservative per cubic foot of wood; (pcf). Specific retentions are established for each preservative to protect the wood in various use applications.

(UC4A) Ground Contact

General Use

(UC3B)Above Ground Exposed Use

Retention (pcf) examples: 0.019, 0.06, 0.15, 0.25

Retention (pcf) examples: 0.40, 0.60

WOOD PROTECTION: PRESERVATIVES

Typical Preservatives for residential useQUALITY

INSPECTED

(EL2)0.019 PCF

(YEAR)

(UC3B)

AWPA U1ABOVE GROUND EXPOSED USE

Treater Name and Plant Location LIFETIME LIMITED WARRANTY

TREATMENT STANDARDS

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RESIDENTIAL DECK CONSTRUCTION:

Codes and Standards

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Building Codes: Dictate the conditions under which treated wood must be used: e.g. IBC/IRC

Standards: Detail how wood should be treated with preservatives. e.g. AWPA Standards

Both codes and standards are necessary and work in tandem to ensure treated wood users, select and use the appropriate material for the given application and conditions.

AMERICAN WOOD PROTECTION ASSOCIATION

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The AWPA is the Standards writing organization for the wood preserving industry in U.S.

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AWPA Standards are developed by its technical committees in an open, consensus-based ANSI accredited process


• Technical forum for industry, research and users.

• Protects consumers by ensuring uniform product performance.

• Referenced in all building codes.• AWPA Book of Standards

AWPA Standards are listed directly in the major model building codes (IRC/IBC) where treated wood is required.

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Treated wood products produced under the AWPA U1 Standards are code compliant.

Alternative acceptance criteria and evaluation reports are available from other evaluation services; such as the ICC-ES


AWPA U1 Standardized Preservatives

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Every preservative standardized is supported by rigorous laboratory and field test data.

• extensive scientific peer review by industry-leading wood

scientists, academics and independent industry experts.

• performance data is scrutinized every five years


RETENTIONSCode Preservative Name UC3B UC4AACQ Alkaline Copper Quaternary (Type B or C) 0.25 0.40ACQ Alkaline Copper Quaternary (Type A or D) 0.15 0.40CA-B Copper Azole, Type B 0.10 0.21CA-C Copper Azole, Type C 0.06 0.15

CuN-W Waterborne Copper Naphthenate 0.07 0.11EL2 DCOI-Imidacloprid-Stabilizer 0.019 ---PTI Propiconazole-Tebuconazole-Imidacloprid 0.018 ---PTI PTI plus Stabilizer 0.013 ---

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AMERICAN WOOD PROTECTION ASSOCIATIONAWPA U1 Standardized Preservatives

3rd party inspections are completed routinely and randomly by American Lumber Standards Committee; (ALSC) accredited inspection agencies.

Inspections test each plant and recently treated stock for conformance to the AWPA Standards.

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AWPA Treating Plant and Product Quality Inspection

Core Sample Analysis:• Retention: PCF of Preservative• Penetration: Depth of treatment


Compliance with AWPA U1 and ALSC Inspection will be noted by the “CheckMark” of Quality on the product end tags.

Not all wood preservative systems are produced under the AWPA U1 standards. Some wood preservative products in the market that are not listed in the AWPA U1 Use Standards (UCS) and are not subject to the AWPA’s inspection protocol.

Products that are compliant with AWPA standards will be have a clearly legible tag that states it is an AWPA Standardized product, and contain the following elements:

•AWPA U1 - this shows the applicable AWPA Standard

•AWPA Use Category – Description and Use category abbreviation describing the proper application for the product

Examples:ABOVE GROUND EXPOSED USE (UC3B)GROUND CONTACT GENERAL USE (UC4A)

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AWPA Use Category System (UCS)


•Preservative name and/or codeExamples of the most common AWPA U1 standardized preservatives:o Alkaline Copper Quaternary (ACQ)o Copper Azole (CA-C)o Ecolife (EL2)o Inorganic Boron (SBX)

•Preservative retention - the amount of preservative retained in the wood, such as 0.17, 0.21, or 0.40, which varies by the type of preservative used.

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• Inspection agency logo – under the AWPA standards, treating plants must subscribe to third-party quality control inspection program. Products treated under the AWPA U1 standards will display the logo of an agency accredited by the American Lumber Standard Committee (ALSC) and a “CheckMark" logo.

•Manufacturer and Location - in the event you need a consumer information sheet or additional information on the product itself, this should help you locate the treating company

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AWPA End Tags Requirements

Use Category System (UCS) Description

ALSC accredited inspection agencyTrademark logo

AWPA U1 Standardized Preservative

Use Category System (UCS) Code

Manufacturer and Plant location

Preservative name and/or

AWPA (Code)Use Category System

(UCS) Retention Level (PCF)Year of

Treatment

CheckMarkOf Quality


Recent updates to the AWPA Use Standards

Modifications were recently made to the treated wood (U1) Use Standards in the American Wood Protection Association’s (AWPA) 2016 Book of Standards.

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AWPA Use Category System (UCS): UC3B and UC4A


Note 1: Joists and beams shall be treated to requirements for UC4A when they are difficult to maintain, repair or replace and are critical to the performance and safety of the entire system /construction.

COMMON AGENTS OF DETERIORATION: Decay fungi and insects

TABLE 2-1 SERVICE CONDITIONS FOR USE CATEGORY DESIGNATIONS (UC3B and UC4A excerpt)

The AWPA standards DO NOT REQUIREGround Contact (UC4A) treated lumber for ALL structural framing and decking components.

For common deck applications, ABOVE GROUND (UC3B) treated lumber is still one of the best options when used appropriately.

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Product treated under the AWPA standards

ABOVE GROUND (UC3B) treated lumber has a history of proven performance while using less preservative chemical.

Above Ground treatments are more cost-effective compared to using material treated with higher levels of the same preservative.

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HERE’S WHAT YOU NEED TO KNOW

USE APPLICATIONS


What do the language changes in the

AWPA-UCS mean?

It’s important to select wood that has the

appropriate level of preservative for its intended

use.

The language changes to the AWPA Use Category System and

supporting guideline tables are intended to help clarify the scenarios

where a higher level of protection should be considered or used.

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USE APPLICATIONS:

UC3B Above Ground Exposed Use:

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USE APPLICATIONS:

Wood and wood based materials used in exterior construction and not in contact with the ground.

For components that may be physically above ground but that are considered

to be difficult to replace and critical to the structure or that may be exposed to

ground contact type hazards due to climate, artificial or natural processes or

construction, ground contact treated materials should be used.

Applications include: joists and beams for decking, walkways, railings and fence pickets.

Under certain circumstances wood should be treated to ground contact retentions when at least one or more of the following conditions occurs:

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When there is a reasonable expectation that soil, vegetation, leaf litter or other debris may build up and remain in contact with the component

USE APPLICATIONS:

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When the construction itself, other structures or anticipated vegetation growth will not allow air flow to circulate underneath the construction and between decking boards

When components are installed less than six inches above ground (final grade after landscaping) and supported on permeable building materials (e.g. treated wood or concrete).

USE APPLICATIONS:

When components are in direct contact with non-durable untreated wood, or any older construction with any evidence of decay.

When components are wetted on a frequent or reoccurring basis (e.g. on a freshwater floating dock or by a watering system)

When components are used in tropical climates

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USE APPLICATIONS:

• The AWPA Use Category System (UCS) continues to allow Above Ground (UC3B) treated wood for the most commonly built decks and outdoor projects.

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Decking Porch Flooring Railings Fence Boards

Deck Joists Support Beams Rim Boards Structural Framing

USE APPLICATIONS:

30Minimum Treatment Level Recommendations

USE APPLICATIONS: RESIDENTIAL DECKS

There is NOrequirement to use

GROUND CONTACT (UC4A)materials for ALL

Above Ground framing and components.

ABOVE GROUND (UC3B)

remains CODE COMPLIANT for the most common

applications

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Collaborative effort by the treated wood industry to simplify the proper selection and usage of treated wood in residential applications.

Supporting Organizations: SLB, AWPA, ICC-ES, WWPI, and SFPA

2016 Treated Wood Selection Guide.

USE APPLICATIONS: RESIDENTIAL DECKS

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DECK BUILDING CODE


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American Wood Council

Design for Code Acceptance

DCA 6Prescriptive Residential Wood Deck Construction Guide

Foundation for almost every state’s deck building code across the US.

DECK BUILDING CODE

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• Construction

• Fasteners

• Connections

• Wood Use

Includes guidance on provisions of the 2012

International Residential Code (IRC)

pertaining to single level residential wood

deck construction.

Provisions contained in this document that

are not included in the IRC are considered

good practice recommendations. Includes

Commentary and Appendices.

DCA 6Prescriptive Residential Wood Deck Construction Guide

DECK BUILDING CODE

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In most states, the code official is empowered to accept alternative materials and methods as equivalent to code-prescribed requirements as long as there is a basis for the approval of the alternative.

Evaluation Reports, such as those that are issued by ICC Evaluation Services (www.icc-es.org), may be acceptable alternatives to the code-prescribed requirements.

The basis can be an evaluation report (ER) issued by a nationally recognized evaluation service, or it could be a report issued by a registered design professional wherein equivalency is established.

DECK BUILDING CODE

Understand the AWPA U1 Treated Wood Preservative and Use Standards (UCS) and CODE COMPLIANT Treatments

Know your Deck Building Code

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Review DCA 6 and jurisdiction requirements with code development and inspection teams

There is no requirement to use Ground Contact (UC4A) treated lumber for ALL structural framing and decking components.

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For the most common deck applications, ABOVE GROUND (UC3B) treated lumber is still one of the best options when used appropriately.

Thank YouFor more information on Code Compliant

treated wood and applications visit

Email questions to us at

[email protected].

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Proud member of the ICC and a Preferred Educational Provider PPP ID # 1531ICC PP Course #: 8943Credit Hours: .1 Hour CEU

mailto:[email protected]

Documents

TREATED WOODViance –Wood Treatment Solutions 1 TREATED WOOD Presented by: RESIDENTIAL DECK CONSTRUCTION ICC PP Course # 8943 Credit Hours: 0.1 Hour CEU Proud member of the ICC and